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Note 11 - Income Taxes - Deferred Tax Asset (Liability) (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Accruals $ 3,404 $ 1,034
Net operating loss carryforwards 56,447 49,246
Tax credit carryforwards 7,111 6,611
Stock-based compensation 8,784 12,188
R&D Capitalization 3,810 0
Lease liability under ASC 842 2,948 3,182
Gross deferred tax assets 82,504 72,261
Valuation allowance (79,779) (69,006)
Total deferred tax assets 2,725 3,255
Intangibles (117) (365)
ROU asset under ASC 842 (2,593) (2,862)
Fixed assets (15) (28)
Total deferred tax liabilities (2,725) (3,255)
Net deferred tax assets/(liabilities) $ 0 $ 0